Before he started work on Season 4 of "Justified," executive producer Graham Yost heard a bunch of questions about who would be this season's Big Bad. So many, he says, that it prompted him to take the show in a different direction."Just the way they said that, in that kind of tired, we-know-what-to-expect way -- I thought, OK, we're not going to do that this year," Yost said in a recent interview. "It was a conscious attempt to mix it up."Rather than dealing with a new adversary this season, Raylan Givens (Timothy Olyphant) is delving into a 30-year-old case (inspired by the "Bluegrass Conspiracy" case in the mid-1980s) involving a fugitive, a bunch of missing drug money and quite possibly his own family. The case has also drawn Raylan's boss, Art (Nick Searcy), out into the field. "He has sort of a personal connection to [the mystery]," Searcy says. "And, you know, I think the...